Star Trek: Enterprise is a science fiction TV series and a prequel to the original Star Trek set 100 years before. The series premiered September 26, 2001 on the UPN television network with the final episode airing on May 13, 2005. The series takes place in the 22nd century aboard Earth's first warp 5 capable starship Enterprise NX-01 designed for long-range exploration of the galaxy and captained by Jonathan Archer. The NX designation indicates that this Enterprise is an experimental prototype.